Crygil has written a post outlining some changes made to the General Vezax 10- and 25-player encounters in patch 3.2 that weren't mentioned in the patch notes. For the hard mode, the team noticed Restoration druids and Enhancement shamans were relying on Omen of Clarity, Shamanistic Rage and Improved Stormstrike to avoid the mana restrictions. To change this, Omen of Clarity will no longer proc for druids, and Shamans get a healing debuff. To compensate, the mana burden has been eased and health of General Vezax and the Saronite Animus was slashed by 25%.

You can read more about the other changes, such as more consistency in the use of General Vezax's Shadow Crashes, in the full post below.

We wanted to make players aware of several changes made to the General Vezax encounter upon the release of patch 3.2, which weren't noted in the official patch notes.

These changes affect both 10-player and 25-player modes. First off, when considering the hardmode of the encounter, the mechanics were overly favoring groups that made heavy use of Restoration druids (Omen of Clarity procs) and “Enhancement” shamans using healing gear (Shamanistic Rage and Improved Stormstrike) to circumvent the mana restrictions. Omen of Clarity will no longer proc for Restoration druids, and Enhancement shamans receive a healing debuff similar to the ones Retribution paladins have had since the encounter’s initial implementation.

Recognizing that this would make the encounter far more difficult for raid groups that have come to rely on those mechanics, we also made changes to ease the overall mana burden when attempting the hardmode. The health of General Vezax and the Saronite Animus was reduced by roughly 25%, and the Animus will now spawn after six Vapors, down from eight, assuming none have been killed.

In addition, prior to 3.2, General Vezax could be very erratic in the use of some of his abilities, leading to long gaps between Shadow Crashes in particular. His behavior in this regard is now more consistent. As a side-effect of this change, in 25-player mode in particular, he will also cast Searing Flames slightly more often – whenever his Fire school isn’t locked out by player interrupts, essentially. Finally, because the “more consistent” Crash use ended up being a bit on the frequent side, a minor hotfix recently increased the period between Crash casts.